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Report No.

SMAP2 protein potentially mediates the response to synthetic auxin, 2,4-D, in ${it Arabidopsis thaliana}$

Nakasone, Akari; Kawai, Maki*; Kiyosue, Tomohiro*; Narumi, Issei; Uchimiya, Hirofumi*; Ono, Yutaka

The phytohormone auxin has roles in controlling various mechanisms in growth, proliferation, and differentiation of plants throughout the life stages. As a research initiative, the analysis of novel mutants created by ion-beam mutagenesis is an effective method. We previously isolated a novel auxin-related mutant which shows a reduced response to the anti-auxin. The SMAP1 gene, which is one of the missing genes in the 44-kb DNA region that is possibly deleted by ion beams in the mutant genome, is responsible for the 2,4-D / anti-auxin-resistant phenotype. The Arabidopsis genome has another copy of the SMAP gene, SMAP2. In this study, to better understand the biological function of the SMAP2 gene and its relationship to the mode of action of 2,4-D, we investigated the expression pattern of the SMAP2 gene and the phenotypic complementation of SMAP2 in the SMAP1 mutant.



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